If this is a store/UWP app then it can only be installed via an appx package. Typically this should be via the store.
If you don't want to (or can't) distribute through the store then you can create a package that can be installed directly.
In VS go to: PROJECT > Store > Create App Packages... > And select No to building a package for the store
Before you can install the app on a machine you'll need to enable developer features on that machine:
Settings > Update & Security > For developers > select: Sideload apps
Then just run the PowerShell script created with the package to install it.
Source:
https://stackoverflow.com/a/33669395/3850405